**Elementary guide to the construction of locks** is a publication that is a true classic in its genre. The authors of the book - A. S. Hobbs and George Dodd - consider in detail the principles of construction and operation of locks. The book contains a comprehensive description of the mechanisms of locks, their development, the main types and principles of operation. In this book, the reader will find information about various types of locks, from simple to complex, as well as analyzes of keys that will help to understand exactly how these mechanisms work. The authors present the material in an accessible and concise manner, which makes the book a useful resource for both security professionals and connoisseurs of the craft. An Elementary Guide to Lock Construction is not only an informative book, but also an excellent resource for those interested in history, technology, and mechanics.